Asbestos is a naturally occurring mineral that was widely used in construction and industrial production throughout the 20th century. It was prized for its heat-resistant properties and low cost. However, it has since been linked to a range of serious health problems, including lung cancer, mesothelioma, and asbestosis. Exposure to asbestos can cause long-term damage to the lungs and respiratory system, and it is a serious hazard that must be addressed with care.